. Canadian forest industries 1916. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. May 15, 1910 CANADA LUMBERMAN AND WOODWORKER 123 which have dots beside which is written 147, 152, etc. This means that that dot or point is determined from the average of 147 or 152 points, the greater number of dots representing greater accuracy. Probably, if the entire number of dots along any curve were totalled, the number would be more than 1,650, because some of them represent nut decades but the distance grown in three, four, five, etc., years. |ust how the av
. Canadian forest industries 1916. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. May 15, 1910 CANADA LUMBERMAN AND WOODWORKER 123 which have dots beside which is written 147, 152, etc. This means that that dot or point is determined from the average of 147 or 152 points, the greater number of dots representing greater accuracy. Probably, if the entire number of dots along any curve were totalled, the number would be more than 1,650, because some of them represent nut decades but the distance grown in three, four, five, etc., years. |ust how the average point or dot was secured is cmite another story. Working Out Tables and Curves The next step is the working up of the figures on the sheets so that the information desired can be obtained. It can be shown graph- ically by curves, or, after the curves are drawn, can be put into the form of a table. Probably the first thing desired will be to make volume tables. This presents no difficulty since the contents in cubic feet, or as given by the New Brunswick rule, can be averaged on the basis of similar diameters and heights, evened off by a curve if the results do not run regularly, and put into the form shown by the table for spruce in cubic feet. This table can be used for estimating pulpwood on a tract of spruce, using 90 cubic feet as a cord. Its results are fairly accurate for 165 trees, but we do not claim for it any more than that; it would be much better if it were fur 1,000 trees. It seems, however, to run fairly close to a similar table in Cary's Manual, taking'corresponding diameters and heights and should be discarded when more trees have been measured. Any- one using it had better check it by measurements on down trees, as a factor of safety. "Safety first" is a good motto for volume tables as well as other things. The securing of the final curves for growth in diameter, height and volume takes longer and represents the winter's office work of the funio
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